There are
521 mi
from Olathe, KS to Watauga, TX
That's the driving distance. It would take 9 hours 2 mins to go from Olathe, Kansas to Watauga, Texas.
The flight distance (direct flight from Olathe, KS to Watauga, TX) is 437.90 mi.
521 mi = 837.73 kms